A personal, guided tour to the best scoops and stories every day in The Wall Street Journal, from Editor in Chief Gerard Baker.

America’s role in the world is back at the forefront of U.S. electoral debate. Our story considers how the Arkansas Senate race between Tom Cotton and Mark Pryor will test whether voters anxious about national security, alongside a host of domestic issues, will embrace a more assertive foreign policy. Few candidates emphasize their military experience more than Mr. Cotton. Meanwhile, the battle for control of the Senate could turn in part on a tiny voting bloc that rarely receives...